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7 Cards in this Set
- Front
- Back
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Distribution of calculus |
Supragingival - above gingival margin, coronal to gingival margins Subgingival - below gingival margin, apical to gingival margin in sulcus/pocket |
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Type of calc - dependant on how recently it was formed |
Brushite - newly formed Whitlockite - less than 6 months old Hydroxyapatite- more than 6 months old |
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Two main theories of calc formation |
Precipitation theory (increased pH, salts precipitated out of solution when it becomes more alkaline)
Nucleation Theory (mostly likely) some element in organic matrix acts as seeding agent, foci for calcification, growth of crystals |
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Define calculus |
Hard deposit formed by the mineralisation of plaque and deposited on teeth or any hard structure Not all plaque mineralises |
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Attachment of calc to tooth ... |
Via pellicle |
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Treatment of calculus |
Scaling RSD |
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Problems with calculus |
Plaque retention factor May contain toxins (plaque) irritate gingival tissues Patient can't remove it |
